We're intelligent finance. Corporate cards, expense management, banking & travel for companies that want to move fast like Anthropic, Plaid, OpenAI, & others.
BREX DATA: AI founder mode is already on the bookshelf?. The Scaling Era by @dwarkesh & @gleech outlines the oral history of how the models got built and debuted at #10. And the 700-page Designing Data-Intensive Applications is tied for the #3 book among startups
BREX DATA: Three of the 25 most-purchased founder books this year are from @stripepress, with two more just outside the list. A payments company that launched a press in 2018 is quietly becoming the startup bookshelf.
BREX DATA: A year ago, Atomic Habits was the #3 book founders bought on Brex. Today it's #11, down 31%. Meanwhile, High Output Management is up 59%, and The Hard Thing About Hard Things and The Philosopher in the Valley are in the top 10.
BREX DATA: Founder mode isn't just talk. It shows up in what founders buy. The most-purchased business book on Brex cards in H1 2026 is a brand-new biography of Alex Karp
Founder mode is back on the bookshelf.
Book purchases across 35,000+ Brex customers. H1 2026's rankings show founder biographies reclaiming the top spot, @stripepress cementing itself as a startup staple, and management frameworks losing ground to AI.
See what's on the bookshelf
The Philosopher in the Valley by Michael Steinberger @WineDiarist
Unreasonable Hospitality by Will Guidara @wguidara
Designing Data-Intensive Applications by @martinkl
The Five Dysfunctions of a Team
by @patricklencioni
The Challenger Sale by Dixon & Adamson
Traction by
